Hi Wiley, I am impressed by the simplicity of Steves composition. You could also have a look at the "Interactive"-Patch which can be used to drag around a Billboard-patch. I didn't used it yet, but maybe it is the right patch for you.
For the animation of the particle system: You can setup the timing to "External Timebase" in the Particle patch (by right-clicking on it) and set a fixed time for it (bigger than 0), then it will stop animating. Achim Breidenbach Boinx Software On 02.11.2011, at 17:53, Steve Mokris wrote: > Wiley - > >> I'm trying to prototype a sort of draggable star map in Quartz composer- it >> would be two layers of randomly scattered stars (each one a repeated .png). > > One option would be to use the built-in Random Generator patch (or a Perlin > noise generator, for example), then pass it through some filters to give it a > more starfield-like appearance. > >> While the particles are static, when you click and drag with the mouse, each >> layer would move at a different rate, creating parallax motion. > > This can be pretty easily achieved using the Sample & Hold patch --- take a > sample of the mouse position when the mouse button is pressed, then subtract > that starting position from the current mouse position, and you get the > delta. Use another Sample & Hold to maintain the position once the mouse > button is released. > > I've posted an example here: > http://kineme.net/composition/smokris/StarfieldParallax > > Steve _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Quartzcomposer-dev mailing list (Quartzcomposer-dev@lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/quartzcomposer-dev/achim%40boinx.com > > This email sent to ac...@boinx.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Quartzcomposer-dev mailing list (Quartzcomposer-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/quartzcomposer-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
